Combine hot water and sugar in small saucepan on the stove over medium-high heat. Stir until the sugar dissolves then remove from heat and let cool 5 minutes. Note: liquid stevia users should skip this step!
Make the lemonade
Stir simple syrup (or stevia) and lemon juice together. Add the ice then the remaining water and stir well. Taste and add more water if it's too sweet.